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277// Copyright 2016 Péter Szilágyi. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package deepstream
import (
"fmt"
"math/rand"
"runtime"
"sync"
"testing"
)
// Tests that topic subscriptions, event publishing and topic unsubscription
// work in single threaded, multi threaded and massively concurrent scenarios.
func TestEventPubSub1Clients1Topics(t *testing.T) { testEventPubSub(t, 1, 1) }
func TestEventPubSub10Clients1Topics(t *testing.T) { testEventPubSub(t, 10, 1) }
func TestEventPubSub1Clients10Topics(t *testing.T) { testEventPubSub(t, 1, 10) }
func TestEventPubSub10Clients10Topics(t *testing.T) { testEventPubSub(t, 10, 10) }
func TestEventPubSub25Clients25Topics(t *testing.T) { testEventPubSub(t, 25, 25) }
func TestEventPubSub100Clients100Topics(t *testing.T) { testEventPubSub(t, 100, 100) }
func testEventPubSub(t *testing.T, clientCount int, topicCount int) {
// Launch a test server and connect a number of clients to it
server := newTestServer(t, map[string]string{"config.yml": ""})
defer server.close()
clients := make([]*Client, clientCount)
var pend sync.WaitGroup
pend.Add(len(clients))
for i := 0; i < len(clients); i++ {
go func(idx int) {
defer pend.Done()
client, err := Dial(server.url)
if err != nil {
t.Fatalf("client %d: failed to connect: %v", idx, err)
}
if err := client.Login(nil); err != nil {
t.Errorf("client %d: failed to login: %v", idx, err)
}
clients[idx] = client
}(i)
}
pend.Wait()
// Concurrently subscribe with all clients to a number of event topics
topics := make([]string, topicCount)
for i := 0; i < len(topics); i++ {
topics[i] = fmt.Sprintf("topic#%d", i)
}
subs := make([][]chan string, len(clients))
for i := 0; i < len(clients); i++ {
subs[i] = make([]chan string, len(topics))
for j := 0; j < len(subs[i]); j++ {
subs[i][j] = make(chan string, len(clients)-1)
}
}
pend.Add(len(clients) * len(topics))
for i := 0; i < len(clients); i++ {
for j := 0; j < len(subs[i]); j++ {
go func(cidx int, tidx int) {
defer pend.Done()
if err := clients[cidx].Subscribe(fmt.Sprintf("topic#%d", tidx), subs[cidx][tidx]); err != nil {
t.Errorf("client %d, topic %d: failed to subscribe: %v", cidx, tidx, err)
}
}(i, j)
}
}
pend.Wait()
// Concurrently inject events with all clients to all channels
pend.Add(len(clients))
for i := 0; i < len(clients); i++ {
go func(idx int) {
defer pend.Done()
for j := 0; j < len(topics); j++ {
if err := clients[idx].Publish(fmt.Sprintf("topic#%d", j), fmt.Sprintf("client#%d", idx)); err != nil {
t.Errorf("client %d, topic %d: failed to publish: %v", idx, j, err)
}
}
}(i)
}
pend.Wait()
// Concurrently wait for all events to arrive and verify them individually too
done := make(map[int]map[int]map[string]struct{})
for i := 0; i < len(clients); i++ {
done[i] = make(map[int]map[string]struct{})
for j := 0; j < len(topics); j++ {
done[i][j] = make(map[string]struct{})
}
}
pend.Add(len(clients) * len(topics))
for i := 0; i < len(clients); i++ {
for j := 0; j < len(topics); j++ {
go func(c int, t int) {
defer pend.Done()
for k := 0; k < len(clients)-1; k++ {
done[c][t][<-subs[c][t]] = struct{}{}
}
}(i, j)
}
}
pend.Wait()
for i := 0; i < len(clients); i++ {
for j := 0; j < len(topics); j++ {
for k := 0; k < len(clients); k++ {
if i != k { // Self events aren't delivered
if _, ok := done[i][j][fmt.Sprintf("client#%d", k)]; !ok {
t.Errorf("client %d, topic %d: missing event from client %d", i, j, k)
}
}
}
}
}
// Concurrently unsubscribe with all clients from all topics and ensure all
// previous subscription channels have been closed
pend.Add(len(clients) * len(topics))
for i := 0; i < len(clients); i++ {
for j := 0; j < len(subs[i]); j++ {
go func(cidx int, tidx int) {
defer pend.Done()
if err := clients[cidx].Unsubscribe(fmt.Sprintf("topic#%d", tidx)); err != nil {
t.Errorf("client %d, topic %d: failed to unsubscribe: %v", cidx, tidx, err)
}
}(i, j)
}
}
pend.Wait()
for i := 0; i < len(clients); i++ {
for j := 0; j < len(topics); j++ {
select {
case data, ok := <-subs[i][j]:
if ok {
t.Errorf("client %d, topic %d: event arrived after unsubscribe: %v", i, j, data)
}
default:
t.Errorf("client %d, topic %d: subscription channel open after unsubscribe", i, j)
}
}
}
}
// Benchmarks the pubsub throughput between two clients.
func BenchmarkEventPubSubLatency1B(b *testing.B) { benchmarkEventPubSubLatency(b, 1) }
func BenchmarkEventPubSubLatency1KB(b *testing.B) { benchmarkEventPubSubLatency(b, 1024) }
func BenchmarkEventPubSubLatency8KB(b *testing.B) { benchmarkEventPubSubLatency(b, 8192) }
func BenchmarkEventPubSubLatency64KB(b *testing.B) { benchmarkEventPubSubLatency(b, 64*1024) }
func BenchmarkEventPubSubLatency256KB(b *testing.B) { benchmarkEventPubSubLatency(b, 256*1024) }
func BenchmarkEventPubSubLatency1MB(b *testing.B) { benchmarkEventPubSubLatency(b, 1024*1024) }
func benchmarkEventPubSubLatency(b *testing.B, chunk int) {
// Launch a test server and connect a sender and a recipent to it
server := newBenchServer(b, map[string]string{"config.yml": "logger:\n name: default\n options:\n logLevel: OFF\n"})
defer server.close()
sender, err := Dial(server.url)
if err != nil {
b.Fatalf("sender failed to connect: %v", err)
}
defer sender.Close()
if err = sender.Login(nil); err != nil {
b.Fatalf("sender failed to log in: %v", err)
}
recipient, err := Dial(server.url)
if err != nil {
b.Fatalf("recipient failed to connect: %v", err)
}
defer recipient.Close()
if err = recipient.Login(nil); err != nil {
b.Fatalf("recipient failed to log in: %v", err)
}
// Subscribe with the recipient to the benchmark topic
ch := make(chan string, b.N)
if err := recipient.Subscribe("b", ch); err != nil {
b.Fatalf("recipient failed to subscribe: %v", err)
}
// Create a random chunk of data to pass around
letters := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
blob := make([]byte, chunk)
for i := range blob {
blob[i] = letters[rand.Intn(len(letters))]
}
data := string(blob)
// Reset the timer and start pushing and reading messages
b.ResetTimer()
b.SetBytes(int64(chunk))
for i := 0; i < b.N; i++ {
sender.Publish("b", data)
<-ch
}
b.StopTimer()
}
// Benchmarks the pubsub throughput between two clients.
func BenchmarkEventPubSubThroughput1B(b *testing.B) { benchmarkEventPubSubThroughput(b, 1) }
func BenchmarkEventPubSubThroughput1KB(b *testing.B) { benchmarkEventPubSubThroughput(b, 1024) }
func BenchmarkEventPubSubThroughput8KB(b *testing.B) { benchmarkEventPubSubThroughput(b, 8192) }
func BenchmarkEventPubSubThroughput64KB(b *testing.B) { benchmarkEventPubSubThroughput(b, 64*1024) }
func BenchmarkEventPubSubThroughput256KB(b *testing.B) { benchmarkEventPubSubThroughput(b, 256*1024) }
func BenchmarkEventPubSubThroughput1MB(b *testing.B) { benchmarkEventPubSubThroughput(b, 1024*1024) }
func benchmarkEventPubSubThroughput(b *testing.B, chunk int) {
// Launch a test server and connect a sender and a recipent to it
server := newBenchServer(b, map[string]string{"config.yml": "logger:\n name: default\n options:\n logLevel: OFF\n"})
defer server.close()
sender, err := Dial(server.url)
if err != nil {
b.Fatalf("sender failed to connect: %v", err)
}
defer sender.Close()
if err = sender.Login(nil); err != nil {
b.Fatalf("sender failed to log in: %v", err)
}
recipient, err := Dial(server.url)
if err != nil {
b.Fatalf("recipient failed to connect: %v", err)
}
defer recipient.Close()
if err = recipient.Login(nil); err != nil {
b.Fatalf("recipient failed to log in: %v", err)
}
// Subscribe with the recipient to the benchmark topic
ch := make(chan string, b.N)
if err := recipient.Subscribe("b", ch); err != nil {
b.Fatalf("recipient failed to subscribe: %v", err)
}
// Create a random chunk of data to pass around
letters := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
blob := make([]byte, chunk)
for i := range blob {
blob[i] = letters[rand.Intn(len(letters))]
}
data := string(blob)
// Reset the timer and start pushing and reading messages
b.ResetTimer()
b.SetBytes(int64(chunk))
threads := runtime.NumCPU()
for t := 0; t < threads; t++ {
go func(idx int) {
iters := b.N / threads
if idx == threads-1 {
iters = (b.N - iters*(threads-1))
}
for i := 0; i < iters; i++ {
sender.Publish("b", data)
}
}(t)
}
for i := 0; i < b.N; i++ {
<-ch
}
b.StopTimer()
}